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Finding the Fourth Proportional to 485.45, 670.04 and 299.01

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Solution

The fourth proportional to 485.45, 670.04 and 299.01 is: 412.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.45 : 670.04 = 299.01 : x
  2. Step 2: Convert to fraction form
    485.45/670.04 = 299.01/x
  3. Step 3: Cross multiply
    485.45x = 670.04 × 299.01
  4. Step 4: Simplify right side
    485.45x = 200,348.66
  5. Step 5: Solve for x
    x = 200,348.66/485.45
  6. Step 6: Final answer
    x = 412.71

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.